Improvement in stamp-mills



H. AHLBORN. Stamp-Mill.

Patented Dec. .9, 1879.

lhvenlbr 9&7/ M.D

"4 5205305. W 59 T of N. PETERS, PHOTOLITHOGRAPHER WASHINGTON- D C.

HENRY AHLBORN, OF VERONA, NEW JERSEY.

IMPROVEMENT IN ST A M P-MILLS.

Specification forming part of Letters Patent No. 222,371, dated December 9, 1879; application filed a September 1'2, 1879. a l

. ing is a specification.

In mills used for stamping dry powder, such as bronze and other colors produced from metals, the foundation-plate or anvil upon" 1 which the stamps work must be perfectly level and solid, and the manner of attaching] the same in the bottom of the box or trough, so as to retain the same in their proper position,

has heretofore been-one of the greatest difficulties. At the same time, in mills formerly constructed the material had to be raked or Sshuffled from time to time during the opera tion to bring the same under the stamps to be operated on. I

I To obviate these difficulties forms the nature of my invention; and the same consists, first,

bin casting the steel bottom plate or anvil into the trough; and, further, in the arrangement of two rows of stamps placed behind each other and alternate, so that the material is forced from one stamp under the next stamp during the operation.

In-the accompanying drawings, Figure I is a sectional side elevation, and Fig. II is a-plan of a stamp-mill embodying my invention.

'A A are the stamps, placed in two rows behind each other and diagonally to each other, 'so that the stamps A come opposite the spaces 1 between the stamps A. By this arrangement the material driven or pushed away from un der one stamp will be brought under the adjoining stamps in the other row, thereby pre venting all necessity for raking or shuffling thematerial during the operation of reducing the same tothe desired fineness. These stamps A A are operated in the-usual manner by means of cams or toes B B, attached to shafts G C, respectively. The shafts (l G are connected together through gear' wheels' D D,

and receive their motion from the shaft F by means of the gear-wheel E, which meshes into the wheel D.

The stamps receive the necessary guide in the plates G G, attached to the frame of the machine, and the lower ends of said stamps.

are made of steel in the usual manner.

' UNITE STATES PATENT OFFICE.

e The trough H is made of any desired shape and size, with its internal surfaces inclined at the bottom inward toward the stamps. The

steel plate or anvil-block J is connected with.

this trough by being inserted into the mold before the same is cast, and thus embodied" into the cast-iron of the trough when com pleted. By this arrangement the edges of this anvil-block J are all embedded into the cast-iron, and the same forms part of the trough, leaving no crevices into which the fine powder can enter and thus destroy the positionof this anvil-block; and, as the same is surrounded and inqlosed on all sides and bottom by the cast-iron, the same cannot be shaken loose by the continued and rapid working of the stamps upon its face, while all fastenings by means of bolts, rivets, or key-bolts willin a very short time become loose, and produce at the same time a joint into which the fine powder enters.

Upon the top of the trough a suitable cover,

S, is attached to confine the material or pow-- der, with suitable openings for the stamps to 7 pass through.

What I claim as my invention, and desire to secure by Letters Patent, is

In stamping-mills, the combination of two sets of upright stamps, A A, placed in two" lines behind and alternate to each other, the

shafts QC, provided with suitable toes, and

the trough H with the anvil-block J, castand embodied into the material of said trough,

substantially in the manner and for thepurpose described. a

HENRY AHLBORN.

Witnesses:

HENRY E. ROEDER, J. B. NoNEs. 

